Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si and high quality Designed to check gas flow on Tig or Mig torches. Flowmeter tester scaled from 0 - 25 litres per in one litre graduations, used for testing the gas flow at the Mig or Tig torch. Simply place the tester over the Mig or Tig gas nozzle and the gas flow is measured from the top of the ball. Disable the HF on Tig welders or you may a shock. Release the Mig wire tensioner to stop the wire feeding when testing. Material:PC Color: Black Length: About 14cm Top Diameter: 1cm/0.39 inch : 1 Pc Package Contents: 1* Co2 gas flow meter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.